+++ /dev/null
-/*
- * Copyright (C) 2014 STMicroelectronics SAS. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, see <http://www.gnu.org/licenses/>.
- */
-
-#include <net/nfc/hci.h>
-
-#include "st21nfca.h"
-#include "st21nfca_se.h"
-
-#define ST21NFCA_EVT_UICC_ACTIVATE 0x10
-#define ST21NFCA_EVT_UICC_DEACTIVATE 0x13
-#define ST21NFCA_EVT_SE_HARD_RESET 0x20
-#define ST21NFCA_EVT_SE_SOFT_RESET 0x11
-#define ST21NFCA_EVT_SE_END_OF_APDU_TRANSFER 0x21
-#define ST21NFCA_EVT_SE_ACTIVATE 0x22
-#define ST21NFCA_EVT_SE_DEACTIVATE 0x23
-
-#define ST21NFCA_EVT_TRANSMIT_DATA 0x10
-#define ST21NFCA_EVT_WTX_REQUEST 0x11
-
-#define ST21NFCA_EVT_CONNECTIVITY 0x10
-#define ST21NFCA_EVT_TRANSACTION 0x12
-
-#define ST21NFCA_ESE_HOST_ID 0xc0
-
-#define ST21NFCA_SE_TO_HOT_PLUG 1000
-/* Connectivity pipe only */
-#define ST21NFCA_SE_COUNT_PIPE_UICC 0x01
-/* Connectivity + APDU Reader pipe */
-#define ST21NFCA_SE_COUNT_PIPE_EMBEDDED 0x02
-
-#define ST21NFCA_SE_MODE_OFF 0x00
-#define ST21NFCA_SE_MODE_ON 0x01
-
-#define ST21NFCA_PARAM_ATR 0x01
-#define ST21NFCA_ATR_DEFAULT_BWI 0x04
-
-/*
- * WT = 2^BWI/10[s], convert into msecs and add a secure
- * room by increasing by 2 this timeout
- */
-#define ST21NFCA_BWI_TO_TIMEOUT(x) ((1 << x) * 200)
-#define ST21NFCA_ATR_GET_Y_FROM_TD(x) (x >> 4)
-
-/* If TA is present bit 0 is set */
-#define ST21NFCA_ATR_TA_PRESENT(x) (x & 0x01)
-/* If TB is present bit 1 is set */
-#define ST21NFCA_ATR_TB_PRESENT(x) (x & 0x02)
-
-static u8 st21nfca_se_get_bwi(struct nfc_hci_dev *hdev)
-{
- int i;
- u8 td;
- struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
-
- /* Bits 8 to 5 of the first TB for T=1 encode BWI from zero to nine */
- for (i = 1; i < ST21NFCA_ESE_MAX_LENGTH; i++) {
- td = ST21NFCA_ATR_GET_Y_FROM_TD(info->se_info.atr[i]);
- if (ST21NFCA_ATR_TA_PRESENT(td))
- i++;
- if (ST21NFCA_ATR_TB_PRESENT(td)) {
- i++;
- return info->se_info.atr[i] >> 4;
- }
- }
- return ST21NFCA_ATR_DEFAULT_BWI;
-}
-
-static void st21nfca_se_get_atr(struct nfc_hci_dev *hdev)
-{
- int r;
- struct sk_buff *skb;
- struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
-
- r = nfc_hci_get_param(hdev, ST21NFCA_APDU_READER_GATE,
- ST21NFCA_PARAM_ATR, &skb);
- if (r < 0)
- return;
-
- if (skb->len <= ST21NFCA_ESE_MAX_LENGTH) {
- memcpy(info->se_info.atr, skb->data, skb->len);
- info->se_info.wt_timeout =
- ST21NFCA_BWI_TO_TIMEOUT(st21nfca_se_get_bwi(hdev));
- }
- kfree_skb(skb);
-}
-
-static int st21nfca_hci_control_se(struct nfc_hci_dev *hdev, u32 se_idx,
- u8 state)
-{
- struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
- int r;
- struct sk_buff *sk_host_list;
- u8 se_event, host_id;
-
- switch (se_idx) {
- case NFC_HCI_UICC_HOST_ID:
- se_event = (state == ST21NFCA_SE_MODE_ON ?
- ST21NFCA_EVT_UICC_ACTIVATE :
- ST21NFCA_EVT_UICC_DEACTIVATE);
-
- info->se_info.count_pipes = 0;
- info->se_info.expected_pipes = ST21NFCA_SE_COUNT_PIPE_UICC;
- break;
- case ST21NFCA_ESE_HOST_ID:
- se_event = (state == ST21NFCA_SE_MODE_ON ?
- ST21NFCA_EVT_SE_ACTIVATE :
- ST21NFCA_EVT_SE_DEACTIVATE);
-
- info->se_info.count_pipes = 0;
- info->se_info.expected_pipes = ST21NFCA_SE_COUNT_PIPE_EMBEDDED;
- break;
- default:
- return -EINVAL;
- }
-
- /*
- * Wait for an EVT_HOT_PLUG in order to
- * retrieve a relevant host list.
- */
- reinit_completion(&info->se_info.req_completion);
- r = nfc_hci_send_event(hdev, ST21NFCA_DEVICE_MGNT_GATE, se_event,
- NULL, 0);
- if (r < 0)
- return r;
-
- mod_timer(&info->se_info.se_active_timer, jiffies +
- msecs_to_jiffies(ST21NFCA_SE_TO_HOT_PLUG));
- info->se_info.se_active = true;
-
- /* Ignore return value and check in any case the host_list */
- wait_for_completion_interruptible(&info->se_info.req_completion);
-
- r = nfc_hci_get_param(hdev, NFC_HCI_ADMIN_GATE,
- NFC_HCI_ADMIN_HOST_LIST,
- &sk_host_list);
- if (r < 0)
- return r;
-
- host_id = sk_host_list->data[sk_host_list->len - 1];
- kfree_skb(sk_host_list);
-
- if (state == ST21NFCA_SE_MODE_ON && host_id == se_idx)
- return se_idx;
- else if (state == ST21NFCA_SE_MODE_OFF && host_id != se_idx)
- return se_idx;
-
- return -1;
-}
-
-int st21nfca_hci_discover_se(struct nfc_hci_dev *hdev)
-{
- struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
- int se_count = 0;
-
- if (info->se_status->is_uicc_present) {
- nfc_add_se(hdev->ndev, NFC_HCI_UICC_HOST_ID, NFC_SE_UICC);
- se_count++;
- }
-
- if (info->se_status->is_ese_present) {
- nfc_add_se(hdev->ndev, ST21NFCA_ESE_HOST_ID, NFC_SE_EMBEDDED);
- se_count++;
- }
-
- return !se_count;
-}
-EXPORT_SYMBOL(st21nfca_hci_discover_se);
-
-int st21nfca_hci_enable_se(struct nfc_hci_dev *hdev, u32 se_idx)
-{
- int r;
-
- /*
- * According to upper layer, se_idx == NFC_SE_UICC when
- * info->se_status->is_uicc_enable is true should never happen.
- * Same for eSE.
- */
- r = st21nfca_hci_control_se(hdev, se_idx, ST21NFCA_SE_MODE_ON);
-
- if (r == ST21NFCA_ESE_HOST_ID) {
- st21nfca_se_get_atr(hdev);
- r = nfc_hci_send_event(hdev, ST21NFCA_APDU_READER_GATE,
- ST21NFCA_EVT_SE_SOFT_RESET, NULL, 0);
- if (r < 0)
- return r;
- } else if (r < 0) {
- /*
- * The activation tentative failed, the secure element
- * is not connected. Remove from the list.
- */
- nfc_remove_se(hdev->ndev, se_idx);
- return r;
- }
-
- return 0;
-}
-EXPORT_SYMBOL(st21nfca_hci_enable_se);
-
-int st21nfca_hci_disable_se(struct nfc_hci_dev *hdev, u32 se_idx)
-{
- int r;
-
- /*
- * According to upper layer, se_idx == NFC_SE_UICC when
- * info->se_status->is_uicc_enable is true should never happen
- * Same for eSE.
- */
- r = st21nfca_hci_control_se(hdev, se_idx, ST21NFCA_SE_MODE_OFF);
- if (r < 0)
- return r;
-
- return 0;
-}
-EXPORT_SYMBOL(st21nfca_hci_disable_se);
-
-int st21nfca_hci_se_io(struct nfc_hci_dev *hdev, u32 se_idx,
- u8 *apdu, size_t apdu_length,
- se_io_cb_t cb, void *cb_context)
-{
- struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
-
- pr_debug("se_io %x\n", se_idx);
-
- switch (se_idx) {
- case ST21NFCA_ESE_HOST_ID:
- info->se_info.cb = cb;
- info->se_info.cb_context = cb_context;
- mod_timer(&info->se_info.bwi_timer, jiffies +
- msecs_to_jiffies(info->se_info.wt_timeout));
- info->se_info.bwi_active = true;
- return nfc_hci_send_event(hdev, ST21NFCA_APDU_READER_GATE,
- ST21NFCA_EVT_TRANSMIT_DATA,
- apdu, apdu_length);
- default:
- return -ENODEV;
- }
-}
-EXPORT_SYMBOL(st21nfca_hci_se_io);
-
-static void st21nfca_se_wt_timeout(unsigned long data)
-{
- /*
- * No answer from the secure element
- * within the defined timeout.
- * Let's send a reset request as recovery procedure.
- * According to the situation, we first try to send a software reset
- * to the secure element. If the next command is still not
- * answering in time, we send to the CLF a secure element hardware
- * reset request.
- */
- /* hardware reset managed through VCC_UICC_OUT power supply */
- u8 param = 0x01;
- struct st21nfca_hci_info *info = (struct st21nfca_hci_info *) data;
-
- pr_debug("\n");
-
- info->se_info.bwi_active = false;
-
- if (!info->se_info.xch_error) {
- info->se_info.xch_error = true;
- nfc_hci_send_event(info->hdev, ST21NFCA_APDU_READER_GATE,
- ST21NFCA_EVT_SE_SOFT_RESET, NULL, 0);
- } else {
- info->se_info.xch_error = false;
- nfc_hci_send_event(info->hdev, ST21NFCA_DEVICE_MGNT_GATE,
- ST21NFCA_EVT_SE_HARD_RESET, ¶m, 1);
- }
- info->se_info.cb(info->se_info.cb_context, NULL, 0, -ETIME);
-}
-
-static void st21nfca_se_activation_timeout(unsigned long data)
-{
- struct st21nfca_hci_info *info = (struct st21nfca_hci_info *) data;
-
- pr_debug("\n");
-
- info->se_info.se_active = false;
-
- complete(&info->se_info.req_completion);
-}
-
-/*
- * Returns:
- * <= 0: driver handled the event, skb consumed
- * 1: driver does not handle the event, please do standard processing
- */
-int st21nfca_connectivity_event_received(struct nfc_hci_dev *hdev, u8 host,
- u8 event, struct sk_buff *skb)
-{
- int r = 0;
- struct device *dev = &hdev->ndev->dev;
- struct nfc_evt_transaction *transaction;
-
- pr_debug("connectivity gate event: %x\n", event);
-
- switch (event) {
- case ST21NFCA_EVT_CONNECTIVITY:
- break;
- case ST21NFCA_EVT_TRANSACTION:
- /*
- * According to specification etsi 102 622
- * 11.2.2.4 EVT_TRANSACTION Table 52
- * Description Tag Length
- * AID 81 5 to 16
- * PARAMETERS 82 0 to 255
- */
- if (skb->len < NFC_MIN_AID_LENGTH + 2 &&
- skb->data[0] != NFC_EVT_TRANSACTION_AID_TAG)
- return -EPROTO;
-
- transaction = (struct nfc_evt_transaction *)devm_kzalloc(dev,
- skb->len - 2, GFP_KERNEL);
-
- transaction->aid_len = skb->data[1];
- memcpy(transaction->aid, &skb->data[2],
- transaction->aid_len);
-
- /* Check next byte is PARAMETERS tag (82) */
- if (skb->data[transaction->aid_len + 2] !=
- NFC_EVT_TRANSACTION_PARAMS_TAG)
- return -EPROTO;
-
- transaction->params_len = skb->data[transaction->aid_len + 3];
- memcpy(transaction->params, skb->data +
- transaction->aid_len + 4, transaction->params_len);
-
- r = nfc_se_transaction(hdev->ndev, host, transaction);
- break;
- default:
- return 1;
- }
- kfree_skb(skb);
- return r;
-}
-EXPORT_SYMBOL(st21nfca_connectivity_event_received);
-
-int st21nfca_apdu_reader_event_received(struct nfc_hci_dev *hdev,
- u8 event, struct sk_buff *skb)
-{
- int r = 0;
- struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
-
- pr_debug("apdu reader gate event: %x\n", event);
-
- switch (event) {
- case ST21NFCA_EVT_TRANSMIT_DATA:
- del_timer_sync(&info->se_info.bwi_timer);
- info->se_info.bwi_active = false;
- r = nfc_hci_send_event(hdev, ST21NFCA_DEVICE_MGNT_GATE,
- ST21NFCA_EVT_SE_END_OF_APDU_TRANSFER, NULL, 0);
- if (r < 0)
- goto exit;
-
- info->se_info.cb(info->se_info.cb_context,
- skb->data, skb->len, 0);
- break;
- case ST21NFCA_EVT_WTX_REQUEST:
- mod_timer(&info->se_info.bwi_timer, jiffies +
- msecs_to_jiffies(info->se_info.wt_timeout));
- break;
- }
-
-exit:
- kfree_skb(skb);
- return r;
-}
-EXPORT_SYMBOL(st21nfca_apdu_reader_event_received);
-
-void st21nfca_se_init(struct nfc_hci_dev *hdev)
-{
- struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
-
- init_completion(&info->se_info.req_completion);
- /* initialize timers */
- init_timer(&info->se_info.bwi_timer);
- info->se_info.bwi_timer.data = (unsigned long)info;
- info->se_info.bwi_timer.function = st21nfca_se_wt_timeout;
- info->se_info.bwi_active = false;
-
- init_timer(&info->se_info.se_active_timer);
- info->se_info.se_active_timer.data = (unsigned long)info;
- info->se_info.se_active_timer.function = st21nfca_se_activation_timeout;
- info->se_info.se_active = false;
-
- info->se_info.count_pipes = 0;
- info->se_info.expected_pipes = 0;
-
- info->se_info.xch_error = false;
-
- info->se_info.wt_timeout =
- ST21NFCA_BWI_TO_TIMEOUT(ST21NFCA_ATR_DEFAULT_BWI);
-}
-EXPORT_SYMBOL(st21nfca_se_init);
-
-void st21nfca_se_deinit(struct nfc_hci_dev *hdev)
-{
- struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
-
- if (info->se_info.bwi_active)
- del_timer_sync(&info->se_info.bwi_timer);
- if (info->se_info.se_active)
- del_timer_sync(&info->se_info.se_active_timer);
-
- info->se_info.bwi_active = false;
- info->se_info.se_active = false;
-}
-EXPORT_SYMBOL(st21nfca_se_deinit);
Code Review / kvmfornfv.git / blobdiff